Provide conda binaries

[astaric]

Ref #80

A conda package (on conda-forge) would allow windows users to use all the widgets. New recipes are added to the conda-forge by opening a pull request to the staged recipes repository.

For inspiration, see existing conda recipes for other add-ons.
https://github.com/conda-forge/orange3-text-feedstock/blob/master/recipe/meta.yaml
https://github.com/conda-forge/orange3-timeseries-feedstock/blob/master/recipe/meta.yaml
https://github.com/conda-forge/orange3-network-feedstock/blob/master/recipe/meta.yaml
https://github.com/conda-forge/orange3-geo-feedstock/blob/master/recipe/meta.yaml

[PrimozGodec]

conda-forge/staged-recipes#4737

[PrimozGodec]

Done, so closing this issue.